This auction is for one miniature push button circuit breaker for operation up to 12 or 24 volts DC or 120 or 250 volts AC. This breaker is rated for 3 amp operation. The device measures approximately 1-1/8 inches (30 mm) high x 1/2 inch wide (13 mm) and 1-3/4 inches deep (48 mm). It mounts in 3/8 inch (10 mm) round hole. The part is not designed for push on / push off manual switch operation, but the button pops out at overload and is reset by pushing back in.